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external diameter:12~70mm
wall thickness:1~8mm
length:14000mm Maximum
silicon
Steel grade and chemical composition( %) | |||||||
Steel grade | carbon≤ | manganese | silicon | phosphorus≤ | sulfur≤ | chromium≤ | molybdenum≤ |
ST35.8 | 0.17 | 0.40~0.80 | 0.10~0.35 | 0.030 | 0.030 |
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ST45.8 | 0.21 | 0.40~1.20 | 0.10~0.35 | 0.030 | 0.030 |
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Mechanical Properties | |||
Grade | Tensile Strength (Mpa) | Yield Point (Mpa) | Elongation (%) |
ST35.8 | 360~480 | ≧235 | ≧25 |
ST45.8 | 410~530 | ≧255 | ≧21 |